Michelle ~ I used to live in Kapolei.  I worked in downtown Honolulu and visited Queens BBQ all the time.  I would love to have the recipe for their tonkatsu sauce.  Do you have any ideas?

Here is a recipe for a simple tonkatsu sauce. When I make it, I omit the dry mustard and just use the Worcestershire sauce and catsup. I use it both on tonkatsu and chicken katsu.